Teflon® AF Tubing and Membrane
Specific Permeability:
Exceptional permeability and outstanding
solvent resistance have made Teflon® AF the
preferred material for manufacturing highly efficient specific
degassing devices.
|
Teflon®
AF Gas Permeability, cB * |
Gas |
Teflon®
AF 2400 |
PTFE |
CO2 |
280,000 |
1200 |
O2 |
99,000 |
420 |
H2 |
220,000 |
980 |
N2 |
49,000 |
140 |
| *
cB = centiBarrer = 10-8 x (cm2
- cm) / (cm - Hg - sec - cm2) |
Teflon® AF Light Guide:
Excellent optical clarity and extremely
low refractive index. Teflon® AF tubing forms
an optical fiber when filled with virtually any transparent
liquid, including water.
Teflon® AF Index of Refraction 1.29
H2O Index of Refraction 1.33
* Raman or Fluorescence Spectroscopy: Liquid
Core Teflon® AF light guide can enable up to
1000 fold intensity enhancement relative to conventional sampling
methods.
* Absorbance Spectroscopy: Liquid Core Teflon®
AF capillary hollow fibers can provide path lengths two to
three orders of magnitude longer than those of current sample
cells, enhancing sensitivity and allowing small sample volume.
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